Can anyone please explain to me what is the Ising model, Hilbert space, and Hamiltonian ? However, please explain it as simple as possible because I am a freshman. I have looked up all three things. I've tried my best to make some sense of it, but I am, honestly, still confused on what any of it means. I hate to ask silly questions, but What is the purpose of the Ising model, Hilbert space, and Hamiltonian? What are some important details that I should, at the very least, need to take away from learning these topics? I am researching on an physical review paper and I need help understanding what those three topics mean. Any knowledge or help given on topic to help me better understand is appreciated. Thank you.